| 摘要 |
FIELD: machine building.SUBSTANCE: invention relates to pressure control systems, particularly, to a system for pressure control in a working assembly. The pressure control system for a working assembly comprises an oil tank, an actuator driven by a control valve, the first pressure control valve used to deliver fluid from the oil tank to the actuator, the second pressure control valve connected to the first pressure control valve. The second pressure control valve comprises a valve section consisting of the second valve section and the third valve section. The second spool is set in the second valve section and is able of displacement. A spring is set in the third valve section and the second valve section is connected to the control valve. The fluid delivered to the second pressure control valve is buffered so that the pressure of fluid supplied to the actuator is increased gradually.EFFECT: higher pressure control accuracy.12 cl, 3 dwg |
